APA

Hughes E. G., Fedorkow D. M., Daya S., Sagle M. A., Van de Koppel P. & Collins J. A. (19921204). The routine use of gonadotropin-releasing hormone agonists prior to in vitro fertilization and gamete intrafallopian transfer: a meta-analysis of randomized controlled trials. : Fertility and sterility.

Chicago

Hughes E G, Fedorkow D M, Daya S, Sagle M A, Van de Koppel P and Collins J A. 19921204. The routine use of gonadotropin-releasing hormone agonists prior to in vitro fertilization and gamete intrafallopian transfer: a meta-analysis of randomized controlled trials. : Fertility and sterility.

Harvard

Hughes E. G., Fedorkow D. M., Daya S., Sagle M. A., Van de Koppel P. and Collins J. A. (19921204). The routine use of gonadotropin-releasing hormone agonists prior to in vitro fertilization and gamete intrafallopian transfer: a meta-analysis of randomized controlled trials. : Fertility and sterility.

MLA

Hughes E G, Fedorkow D M, Daya S, Sagle M A, Van de Koppel P and Collins J A. The routine use of gonadotropin-releasing hormone agonists prior to in vitro fertilization and gamete intrafallopian transfer: a meta-analysis of randomized controlled trials. : Fertility and sterility. 19921204.